John hunter



J. HUNTER.

GAS BURNER.

APPLICATION men AUG 6. 10m] Patented Aug. 19. 1919.

E H B 5V5 YET; M

JOHN HUNTER, OF BARROW-IN-FURNESS, ENGLAND.

GAS-BURNER.

Specification of Letters Patent.

Patented Aug. 19, 1919.

Application filed August 6, 1918. Serial No. 248,575.

To all whom it may concern Be it known that I, Joux Htx'rnu, a subject of the King of Great Britain, residing at Barrow-in-Furness, in the county of Lancaster, in the Kingdom of England, have invented certain new and useful Improvements in (Eras-Burners, of which the following is a specification.

This invention has reference to burners for heating'by gas, such as are required for-domestic heating, cooking and ironing,

-also for soldering, the production of asbestos gas fires and other purposes.

The invention will be understood from the following description reference being had to the accompanying drawings in which Figure 1 is a longitudinal section of the burner, and

Fig. 2 is a sideelevation thereof.

Referring to these figures, the burner is made in two parts. One part consists of the burner tube E at the bottom of which is the chamber B and the contracted axial apertureor nozzle D, the said nozzle having a flaring entrance F with sides converging toward the nozzle, while the other side of the nozzle is flared in the opposite direction,

as at G, so that its sides diverge toward the sides of the burner tube E. The lower part of the burner tube above the nozzlel) is provided with apertures or perforations H for the admission of air. and the chamber Eat the lower part of the burner tube has perforations C for the admission of air so that the gas becomes charged with air before and after it passes through the nozzle D. -The other part of the bm-nerconsists of a nipple I provided with a contracted nozzle A which enters the flaring mouth F, such nipple being screwed into the gas supply or service pipe or into a tubular fitting, neither of which are shown in the drawing.

The inclination of the flaring entrance Fis such that the angle or shoulder formed at the junction of the flaring mouth with the said nozzle D is only a little more than forty-five degrees to the axis of the burner, and the nozzle A which projects up into proximity with the flaring entrance F is chamfered exteriorly at the top so that the angle of the chamter and the angle of the i laringentrance sul'istantially correspond but leave a space between of no considerable *apacity so that the gas emerging from the nozzle it draws in,air through the perforations C in the chamber B on the principle of an injector,-and causes the air to be drawn laterally over the jet of gas, the object being to thoroughly mingle the air w th the gas, increase the volume of the latter and add to the lightness of the mixture. By this means the air and gas mixture is given considerable velocity, so that it is supplied to the burner under sufficient pressure to prevent back firing and back flashing. It will be observed that the air is caused to mingle with the gas at two different points, namely in the chamber B and in the burner tube E so that a very th0rough mixing ofthe a' and gas is secured.

The device utilizes the pressure of the gas from the main to produce a blow pipe flame, the gas issuing through the nozzle A under pressure thereby inducing a continuous current of air to enter through the perforations C which air mixing or uniting with the gas passes through the nozzle 1) and is ignited at the top of the burner tube. The arrangement prevents any danger ot' the flame burning back in the burner tube.

I declare that what I claim is 1. A gas burner composed of a burner tube at the bottom of which is a chamber having perforations for the admission of air and a contracted axial aperture or nozzle having a flaring entrance the inclination of which is such that the angle or shoulder formed at the junction of the flar-- ing mouth with the said nozzle is only a little more than forty-five degrees to the aXis of the burner, and a gas supply nozzle which projects up into the flaring entrance and is chamfered exteriorly at the topso that the angle of the chamfer substantially corresponds to the angle of the flaring entrance but leaves a space between of no considerable capacity, whereby gas emerging from the nozzle draws in air through the perforations in the chamber and causes it to be drawn laterally over the jet of gasby which a more thorough mixing of the gas and air is obtained.

2. A gas burner, comprising in combination a tubular member having a cross partition adjacent the lower end thereof with a nozzle or an aperture formed centrally therein, the upper face of the cross wall or partition being concave with openings extending through the wall above and adjacent said rounded portion, the under wall 10 partition, and the upper end of said nip- .ple being inclined so that its face stands in substantial parallelism with the under .face

of the cross partition aforesaid. In Witness whereof, I have hereunto signed my name this 10th day of July, 1918, 1

in the presence-of two subscribing Witnesses.

' JOHN HUNTER. Witnesses W. H. ATKINSON, A. J. BROWN. 

